Leak Arithmetic

Implement a model of a function's allocation paths and predict balance: ``c /* ops string: 'A' = allocate (success), 'a' = allocate (FAILED), 'F' = free, 'R' = early return on this path. For ONE path (prefix up to 'R', or whole string if no 'R'): return 1 if the path is balanced (no leak), 0 if it leaks. */ int path_leaks(const char *ops); `` An allocation that failed ('a') needs no free. An allocation that succeeded ('A') must be freed ('F') before the path ends. NULL/empty: balanced (1).

Difficulty: intermediate